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WLAN as a Component (WaaC)Date: 2019-09-xx
Authors:Name Affiliation Phone Email
Yonggang Fang ZTETX
Bo Sun ZTE
He Huang ZTE
Notice:This document represents only the views of the participants listed in the ‘Authors:’ field above. It is offered as a basis for discussion. It is not binding on contributors, who reserve the right to add, amend or withdraw material contained herein.
Copyright policy:The contributor is familiar with the IEEE-SA Copyright Policy <http://standards.ieee.org/IPR/copyrightpolicy.html>.
Patent policy:The contributor is familiar with the IEEE-SA Patent Policy and Procedures:<http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and <http://standards.ieee.org/guides/opman/sect6.html#6.3>.
Abstract
This contribution is intended to discuss WLAN as a Component (WaaC) to support incorporation with other technologies.
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Background
• Issues– No single external interface for 3GPP to interwork
with and control the standardized 802.11 WLANs.– Need a cloud based standardized network
management system to manage the carrier-grade WLAN.
– The future 5G technologies require multi-technologies coexistence over the same medium, which requires to avoid any impediment for the use of appropriate 802.11 technology in a future 5G network.
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Background
• What is a Component?– A component has
• defined functions and • defined external interfaces to communicate with
others.
– Interoperable• It should be possible to swap implementations of
the component from different sources if those implementations are compliant to the defined functions and external interfaces.
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WLAN as a Component
• Basic WaaC
BSS1
BSS2
BH
NA2
NA1
ANCExternal
Management/Control Plane Interface
External Data Plane Interface
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WLAN as a Component
• Functional Entities – Node of Attachment (NA):
• IEEE 802.11 based radio access stations operating in license-exempt frequency bands or shared authorized license frequency band(s).
– Backhaul (BH): • Manage the backhaul network setup and configuration• Control the user data plane traffic forwarding
– Access Network Controller: • Manage radio access network setup and configuration.
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WLAN as a Component
• Separated Planes– Data Plane Functionalities:
• carrying, sequencing, tunneling, forwarding the user data traffic between the Core network, AN
– Control Plane Functionalities: • service management, user traffic connection setup,
mobility management, accounting management, etc.
– Management Plane Functionalities• carrying messages for authenticating, controlling and
managing IEEE 802.11 AN • For different WaaC use cases.
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Use Case of WaaC
Cloud Management System
Internet
BSS1
BSS2
ANC
NA2
NA1
BH
• Cloud Management– manage and control carrier-
grade WLAN through management/control interface
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Use Case of WaaC
• Why needs Cloud Management– Support of 5G broadband access in dense area and
everywhere such as public venues, especially for massive Internet of Things, to manage a large number of APs efficiently and effectively.
– Support a central controlled management system to consolidate management of multiple local WiFi networks offered by single service provider
– Support the carrier-grade WLAN integrated with other wireless infrastructure managed through a unified management system.
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Use Case of WaaC
• Sharing by Multi-Cores– Provide sharing to multi-Core to reduce the cost of
Service Providers
Core 1
Core 2
VLAN1
VLAN2
BSS1
BSS2
BH
NA2
NA1
ANC
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Use Case of WaaC
• Why needs Sharing with Multi Cores– Required by 5G, not only reduce the cost of service
providers, but also improve medium usage efficiency in the limited spectrum.
– Maximize utilization of available resources to meet 5G requirements.
– Support 5G business model of XaaS, IaaS, NasS, PaaS.
– Offer enriched and value creation capabilities. – Some incumbent deployment has to share RAN with
other existing service providers and operators.
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Use Case of WaaC
3GPP CORE
BSS1
BSS2
BH (TWAG)
NA2
NA1
AAA Server
PDN GW
STa
S2a
Trusted Non-3GPP WLAN
HSS
ANC (TWAP)
• Interworking – Control plane is connected through
ANC/TWAP to AAA server in 3GPP Core.
– User data plane is connected to PDN GW over BH/TWAG.
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Use Case of WaaC
• Why needs Interworking– Support 3GPP interworking with WiFi for data
offloading. – Support future LTE LAA coexisting with WiFi over
unlicensed band.– Standardize the external interface of WaaC for
interworking with the future 5G multi-technologies.
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Summary• WaaC is proposed to address future 5G requirements.
OmniRAN should take the network reference model into account for the WaaC.
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